Tiger Woods remained comfortably in first, followed by Ernie Els, Davis Love III, Phil Mickelson and Masters champion Mike Weir.
Vijay Singh held on to the sixth spot and David Toms, the 2001 PGA Champion, stayed in seventh. Jim Furyk and Retief Goosen switched places from last week with Furyk moving to eighth and the South African dipping to ninth. Padraig Harrington rounded out the top-10 as the only European in the upper echelon.
Sergio Garcia took 11th this week, followed by Nick Price. Justin Leonard jumped to 13th while Chris DiMarco fell to No. 14. Scott Hoch took 15th.
Robert Allenby came in 16th, Rocco Mediate was 17th and Charles Howell III took 18th. Colin Montgomerie and Jerry Kelly filled out the top-20 for the second week in a row.
Hank Kuehne, Mark Calcavecchia and Stuart Appleby were the joint runners-up at the Houston Open. Kuehne improved 81 spots to No. 108, Appleby moved up to No.30 and Calcavecchia returned to the top-50 at No. 50.